Table 16. Troubleshooting (continued)
Problem indicator Component Possible cause Possible solutions
drive is not visible
in the Storage
Manager software
Several
components
Drive failure Replace the failed drive or
drives.
SAS cable failed Replace the SAS cable.
controller failure Replace controller. See Chapter 5,
“Replacing components,” on
page 105 for more information.
Midplane failure Replace the DS3500. Contact
your IBM technical-support
representative.
A drive has an
interface problem
with the ESM or
controller.
Replace the drive. See Chapter 5,
“Replacing components,” on
page 105 for more information.
Incorrect firmware
version
Ensure that the DS3500 has the
correct firmware version. See
“Software and hardware
compatibility and upgrades” on
page 15.
In a dual-controller
storage subsystem,
one controller has
failed, and in the
drive channel that
originates from the
other (functioning)
controller, an ESM
has failed.
Replace the failed controller and
ESM. See Chapter 5, “Replacing
components,” on page 105 for
more information.
Storage enclosure
is not detected
Storage
subsystem
storage enclosure is
not supported
Verify that the storage enclosure
is supported by the DS3500
storage subsystem.
SAS cable failed Replace the SAS cable.
Solving problems in the EXP3500 storage enclosure
The following table contains troubleshooting information to help you solve some
basic problems that you might have with the EXP3500 storage enclosure.
Table 17. Troubleshooting information
Component Problem indicator Possible cause Possible solutions
Drive Amber fault LED lit Drive failure Replace the failed drive. See Chapter 5, “Replacing
components,” on page 105 for more information.
ESM Board failure Replace the failed ESM. See Chapter 5, “Replacing
components,” on page 105 for more information.
Front panel General machine
fault
A status or fault LED is lit. Check for amber LEDs
on components. See “Checking the LEDs” on page
88.
Chapter 6. Solving problems 167
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